If you modify the ports, close some ports that are opened by default in the system to prevent viruses or Trojan horses from connecting remotely. It can be operated as follows:

1. Enter cmd at the run command line.

2. Then enter netstat/an to check the opening of the port.

If you want to modify the network port of a program. It depends on whether the program itself has this function. Under normal circumstances, it cannot be modified by itself. Port mapping can still be done.

The concept of network port:

In network technology, ports have two meanings:

First, ports in the physical sense, such as interfaces used by ADSLModem, hubs, switches and routers are connected to other network devices, such as RJ-45 ports and SC ports.

The second is logical port, which generally refers to the port in TCP/IP protocol. Port numbers range from 0 to 65535, such as port 80 for browsing web services, port 2 1 for FTP services and so on.